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McCullough Foundation at a glance

· Private foundation

McCullough Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$121k
Granted FY2025still arriving
62
Grants FY2025still arriving
20
States reached
$15k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0189% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2024.

Human Services$98kInternational$96kReligion$78kEnvironment$51kArts & Culture$28kPhilanthropy$25kEducation$19kHousing & Shelter$17kOther$0
02FY2025 · 62 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k59 grants · $79k
  • $10k–50k3 grants · $41k
$1,000
Median grant
20
States reached
$1.1M
Total assets
Largest grants
RecipientAmount
PARK MCCULLOUGH HOUSE$15,100
NORTH STONINGTON CONGREGATIONAL CHURCH$14,000
WORLD BICYCLE RELIEF$12,000
CHIKUMBUSO$6,000
IMBA$5,000
AMER FRIENDS SVC COMM-AFSC DEV FD$5,000
PLANNED PARENTHOOD$4,000
MERCY CORPS$4,000
UNITED WAY OF SE CONNECTICUT$3,500
AMERICAN RED CROSS$3,000
Individual grant recipient$3,000
FINCA$3,000
CONNECTICUT FOODSHARE$3,000
WHEELER LIBRARY$3,000
DOCTORS WITHOUT BORDERS$2,500
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY20–25, $28k) land where the poverty rate runs at 12%, against an area that typically sits at 10%. 64% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%MADONNA PLACE: $100 → 21%MADONNA PLACE: $100 → 21%MADONNA PLACE: $100 → 21%MADONNA PLACE: $100 → 21%MADONNA PLACE: $100 → 21%AMERICAN RED CROSS: $2k → 11%MADONNA PLACE: $100 → 21%AMERICAN RED CROSS: $2k → 11%AMERICAN RED CROSS: $1k → 11%AMERICAN RED CROSS: $3k → 14%AMERICAN RED CROSS: $2k → 14%AMERICAN RED CROSS: $2k → 14%AMERICAN RED CROSS: $2k → 14%AMERICAN RED CROSS: $2k → 14%AMERICAN RED CROSS: $1k → 14%PAWCATUCK NEIGHBORHOOD CENTER TRANPORTATION PROGRAM: $3k → 9%PAWCATUCK NEIGHBORHOOD CENTER TRANPORTATION PROGRAM: $2k → 9%PAWCATUCK NEIGHBORHOOD CENTER TRANPORTATION PROGRAM: $2k → 9%PAWCATUCK NEIGHBORHOOD CENTER TRANPORTATION PROGRAM: $2k → 9%PAWCATUCK NEIGHBORHOOD CENTER TRANPORTATION PROGRAM: $2k → 9%PAWCATUCK NEIGHBORHOOD CENTER TRANPORTATION PROGRAM: $500 → 9%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

ME
VT
WA
MN
IL
NY
MA
OR
IN
PA
CT
RI
CA
CO
MO
VA
MD
AZ
NC
DC
HI
OK
LA
AL
GA
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

97%of every dollar goes to organizations it has funded before.
$605k · 72 repeat orgs$17k to everyone else

Grantees it renews have grown median revenue +52% since the first grant, against +14% for those funded once.

72 repeat relationships: 58 still active in FY2025, 14 since wound down; 3 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

72
18

Total granted

$605k
$14k

Median revenue growth · since first grant

+52%
+14%

Still filing today

54%
50%

New vs renewed · share of each year

In FY2025, 97% of grant dollars renewed an existing relationship; $4k went to new ones.

50%100%’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’20’21’22’23’24’25
InternationalEnvironmentArts & CultureEducationHealthHuman ServicesOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • WORLD BICYCLE RELIEF NFP
    5× · 2020–2025 · $46k · revenue +52%
  • MC
    Mercy Corps
    6× · 2020–2025 · $27k · revenue +16%
  • CF
    CONNECTICUT FOODSHARE INC
    6× · 2020–2025 · $19k · revenue +97%

Funded once

  • MU
    MAUI UNITED WAYgraduated
    one grant, 2023 · $10k · revenue +188%
  • AR
    AMERICAN RED CROSS OF CONNECTICUT
    one grant, 2024 · $2k
  • CL
    CT LEAGUE OF CONSERVATION VOTERS EDUCATION FUND
    one grant, 2023 · $250 · revenue +3%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
Nantucket Conservation Foundation Inc

The nantucket conservation foundation owns, protects, and stewards over 9,000 acres of land and coastal shoreline, conserves nantucket's rare and significant natural resources, and engages in impactful ecological research to inform…

Environment
2
Conservation Law Foundation Inc

Conservation law foundation, inc. (clf) protects new england's environment for the benefit of all people and future generations. we use the law, science, and markets to create solutions that preserve and restore our natural resources,…

Environment
3
Conservation International Foundation

Ci works to spotlight and secure the critical benefits that nature provides to humanity.

Environment
4
The Union of Concerned Scientists Inc

The union of concerned scientists puts rigorous, independent science into action, developing solutions and advocating for a healthy, safe, and just future.

International
5
National Caucus of Environmental Legislators

The national caucus of environmental legislators empowers a nonpartisan network of legislative champions to protect, conserve, and improve the natural and human environment.

Education
6
Wildlands Trust Inc

The wildlands trust works throughout southeastern massachusetts to conserve and permanently protect native habitats, farmland, and lands of high ecologic and scenic value that serve to keep our communities healthy and our residents…

Environment
7
Rainforest Trust

Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.

International
8
The Quebec-Labrador Foundation Inc

The program mission of the quebec-labrador foundation u.s. is defined by a regional component (new england and eastern canada), and an international component, which ties our regional model to a global conservation network. qlf's program…

Philanthropy
9
National Association of Clean Water Agencies

Nacwa is the national voice of public clean water utilities, shaping water policy, convening a vibrant peer network, and empowering water leaders.

—
10
World Wildlife Fund Inc

Wwf's mission is to conserve nature and reduce the most pressing threats to the diversity of life on earth. (continued on schedule o)

Environment
11
Native Plant Trust Inc

The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.

Environment
12
Sustainable Ct Inc

To inspire, support, and certify sustainability actions by connecticut towns and cities.

Education
How this is measured
The grantee most central to the portfolio’s shape is Waterorg; the most unlike its peers is Dana-Farber Cancer Institute Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

54 grantees tracked through their own filings, 2017–2026.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2026, not grant rows in a single year, so this will not match the grant count on the cover. 54 of the 97 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
11
Early backer (in before they grew)
53/54
Grantees still filing
41/54
Grew since first funded

Where the money sits, by cause and then by grantee

PARK MCCULLOUGH HOUSE: $86,100 · OtherPARK MCCULLOUGH HOUSENORTH STONINGTON CONGREGATIONAL CHURCH: $53,400 · OtherNORTH STONINGTON CONGREGATIONAL CHURCHCONGREGATIONAL CHURCH OF NORTH STONINGTON: $38,300 · OtherCONGREGATIONAL CHURCH OF NORTH STONINGTONCHIKUMBUSO: $24,300 · OtherCHIKUMBUSOAMER FRIENDS SVC COMM-AFSC DEV FD: $22,000 · OtherCONNECTICUT FOODSHARE INC: $19,000 · OtherPLANNED PARENTHOOD: $17,000 · OtherUNITED WAY OF SE CONNECTICUT: $16,550 · OtherWHEELER LIBRARY: $15,600 · Other+61 more: $151,450 · Other+61 moreMercy Corps: $27,000 · InternationalMercy Cor…FINCA INTERNATIONAL INC: $13,000 · InternationalFINCA INT…MEDECINS SANS FRONTIERES USA INC: $11,500 · InternationalMEDECINS …+5 more: $1,800 · InternationalWORLD BICYCLE RELIEF NFP: $46,000 · Public Safety & DisasterOCEANA INC: $11,500 · EnvironmentAVALONIA LAND CONSERVANCY INC: $10,200 · EnvironmentSAVE THE SOUND: $4,500 · EnvironmentDENISON PEQUOTSEPOS NATURE CENTER: $1,500 · EnvironmentWood-Pawcatuck Watershed Association: $1,500 · Environment+3 more: $1,350 · EnvironmentAmerican National Red Cross & Its Constituent Chapters and Branches: $17,000 · Human ServicesPAWCATUCK NEIGHBORHOOD CENTER INC: $10,000 · Human Services+1 more: $600 · Human ServicesGarde Arts Center Inc: $15,000 · Arts & CultureMYSTIC SEAPORT MUSEUM INC: $800 · Arts & Culture+3 more: $350 · Arts & CultureMAUI UNITED WAY: $10,000 · PhilanthropyTHE SUMMIT FOUNDATION: $400 · Philanthropy
Other$443,700International$53,300Public Safety & Disaster$46,000Environment$30,550Human Services$27,600Arts & Culture$16,150Philanthropy$10,400

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetWORLD BICYCLE RELIEF NFP: $46,000 over 5y, 0.1% of budgetMercy Corps: $27,000 over 6y, 0.0% of budgetCONNECTICUT FOODSHARE INC: $19,000 over 6y, 0.0% of budgetAmerican National Red Cross & Its Constituent Chapters and Branches: $17,000 over 6y, 0.0% of budgetGarde Arts Center Inc: $15,000 over 6y, 0.1% of budgetFINCA INTERNATIONAL INC: $13,000 over 6y, 0.1% of budgetOCEANA INC: $11,500 over 5y, 0.0% of budgetMEDECINS SANS FRONTIERES USA INC: $11,500 over 6y, 0.0% of budgetAVALONIA LAND CONSERVANCY INC: $10,200 over 6y, 0.3% of budgetPAWCATUCK NEIGHBORHOOD CENTER INC: $10,000 over 6y, 0.1% of budgetMAUI UNITED WAY: $10,000 over 1y, 0.6% of budgetPOPULATION CONNECTION: $9,000 over 6y, 0.0% of budgetSOUTHERN POVERTY LAW CENTER INC: $6,500 over 5y, 0.0% of budgetLYCOMING COLLEGE: $6,100 over 5y, 0.0% of budgetSAVE THE SOUND: $4,500 over 6y, 0.0% of budgetTHE NATURE CONSERVANCY: $4,000 over 4y, 0.0% of budgetSANDY HOOK PROMISE FOUNDATION: $3,000 over 5y, 0.0% of budgetPEOPLE FOR THE AMERICAN WAY FOUNDATION: $2,350 over 5y, 0.0% of budgetNORTH STONINGTON HISTORICAL SOCIETY INC: $2,050 over 6y, 1.8% of budgetThe Chorus of Westerly Inc: $1,800 over 5y, 0.0% of budgetDENISON PEQUOTSEPOS NATURE CENTER: $1,500 over 6y, 0.0% of budgetWood-Pawcatuck Watershed Association: $1,500 over 6y, 0.1% of budgetXERCES SOCIETY INC: $1,250 over 5y, 0.0% of budgetNorth Stonington Education Foundation Inc: $1,100 over 5y, 0.9% of budgetHabitat for Humanity of Eastern Connecticut Inc: $1,000 over 1y, 0.0% of budgetNEW VENTURE FUND: $1,000 over 1y, 0.0% of budgetMYSTIC SEAPORT MUSEUM INC: $800 over 4y, 0.0% of budgetNEW LONDON COUNTY HISTORICAL SOCIET: $700 over 6y, 0.2% of budgetALWAYS HOME INC: $600 over 6y, 0.0% of budgetMadonna Place Inc: $600 over 6y, 0.0% of budgetAmerican Heart Association Inc: $600 over 5y, 0.0% of budgetIsland Institute: $600 over 6y, 0.0% of budgetWOMEN FOR WOMEN INTERNATIONAL: $550 over 6y, 0.0% of budgetWATERORG: $500 over 5y, 0.0% of budgetSPREAD THE VOTE INC: $450 over 2y, 0.0% of budgetTHE SUMMIT FOUNDATION: $400 over 4y, 0.0% of budgetCLIMATE LEADERSHIP COUNCIL INC: $300 over 3y, 0.0% of budgetCHURCH WORLD SERVICE INC: $300 over 3y, 0.0% of budgetWORLD VISION INC: $300 over 3y, 0.0% of budgetNEW ORLEANS HABITAT FOR HUMANITY: $300 over 4y, 0.0% of budgetBONNELL COVE FOUNDATION: $300 over 3y, 0.1% of budgetCT LEAGUE OF CONSERVATION VOTERS EDUCATION FUND: $250 over 1y, 0.1% of budgetNorth Stonington Citizens Land Alliance Inc: $250 over 5y, 0.8% of budgetPARKINSON'S FOUNDATION INC: $200 over 4y, 0.0% of budgetMount Desert Land and Garden Preserve: $200 over 4y, 0.0% of budgetTHE WRITER'S BLOCK INK INC: $150 over 2y, 0.0% of budgetFUND FOR RECONCILIATION & DEVELOPMENT: $150 over 3y, 0.3% of budgetFILMMAKERS COLLABORATIVE: $100 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

  • Who funds WORLD BICYCLE RELIEF NFP ↗
  • Who funds Mercy Corps ↗
  • Who funds CONNECTICUT FOODSHARE INC ↗
  • Who funds American National Red Cross & Its Constituent Chapters and Branches ↗
  • Who funds Garde Arts Center Inc ↗
  • Who funds FINCA INTERNATIONAL INC ↗
  • Who funds OCEANA INC ↗
  • Who funds MEDECINS SANS FRONTIERES USA INC ↗
  • Who funds AVALONIA LAND CONSERVANCY INC ↗
  • Who funds PAWCATUCK NEIGHBORHOOD CENTER INC ↗
  • Who funds MAUI UNITED WAY ↗
  • Who funds POPULATION CONNECTION ↗
  • Who funds SOUTHERN POVERTY LAW CENTER INC ↗
  • Who funds LYCOMING COLLEGE ↗
  • Who funds SAVE THE SOUND ↗
  • Who funds THE NATURE CONSERVANCY ↗
  • Who funds SANDY HOOK PROMISE FOUNDATION ↗
  • Who funds PEOPLE FOR THE AMERICAN WAY FOUNDATION ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Chelsea Groton Founda…The Community Foundat…The Pfizer Foundation…Dime Bank Foundation …The Edward and Mary L…Dominion Energy Chari…Connecticut Humanitie…Kitchings Family Foun…Washington Trust Co C…Liberty Bank Foundati…The Nordson Corporati…The Rhode Island Comm…
Chelsea Groton FoundationCT25.9× affinity10 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Chelsea Groton Foundation · The Community Foundation of Eastern Connecticut Inc · The Pfizer Foundation Inc · Dime Bank Foundation Inc · The Edward and Mary Lord Foundation · Dominion Energy Charitable Foundation · Connecticut Humanities Council Inc · Kitchings Family Foundation · Washington Trust Co Charitable Fdn · Liberty Bank Foundation Inc · The Nordson Corporation Foundation · The Rhode Island Community Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization McCullough Foundation funds: left to right is the share of its income from government, bottom to top the share from McCullough Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 70%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 7%
  • Mercy Corps: 47% of income from government
  • Save the Sound: 37% of income from government
  • Xerces Society Inc: 22% of income from government
  • Avalonia Land Conservancy Inc: 21% of income from government
  • Madonna Place Inc: 20% of income from government
  • Garde Arts Center Inc: 10% of income from government
  • Dana-Farber Cancer Institute Inc: 7% of income from government
  • Connecticut Foodshare Inc: 5% of income from government
  • Mystic Seaport Museum Inc: 5% of income from government
  • Connecticut Public Broadcasting Inc: 3% of income from government
  • The Writer's Block Ink Inc: 2% of income from government
  • Sandy Hook Promise Foundation: 0% of income from government
  • Denison Pequotsepos Nature Center: 0% of income from government
  • American Speech-Language-Hearing Association: 0% of income from government
no gov moneyreceives it· size = income
7get no government money at all
9report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
typical government reliance, FY20–25
How this is measured
Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to McCullough Foundation?

Find your warmest path to McCullough Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 97 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on McCullough’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home